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接种与调酸发酵对白菜中亚硝酸盐含量的影响 被引量:4
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作者 刘丛丛 纪凤娣 李博 《食品工业科技》 CAS CSCD 北大核心 2013年第10期215-218,234,共5页
为探寻腌制菜中亚硝酸盐含量超标的抑制手段,研究了接种和调酸发酵工艺对腌制白菜中亚硝酸盐含量的降低作用。以新鲜白菜为供试材料,采用接种初始浓度为2×10~6CFU/mL的乳酸菌或用0.2mol/L乳酸缓冲液调节发酵初始pH为3.5、4.0、4.5... 为探寻腌制菜中亚硝酸盐含量超标的抑制手段,研究了接种和调酸发酵工艺对腌制白菜中亚硝酸盐含量的降低作用。以新鲜白菜为供试材料,采用接种初始浓度为2×10~6CFU/mL的乳酸菌或用0.2mol/L乳酸缓冲液调节发酵初始pH为3.5、4.0、4.5、5.0的发酵工艺,评价二者对其亚硝酸盐含量的降低效果。结果表明,当采用接种发酵工艺时,发酵白菜中硝酸盐含量显著下降,亚硝酸盐含量不超过1mg/kg。调节初始发酵液pH〈4.5时,可以抑制发酵过程中亚硝酸盐的产生,使其低于3mg/kg。接种与调酸发酵工艺都能使发酵白菜中亚硝酸盐含量低于国家安全标准,比自然发酵工艺对人体健康更为有利。 展开更多
关键词 白菜 亚硝 接种发酵 调酸发酵
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A Research Overview on Arachidonic Acid:Fermentation Regulation and Purification
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作者 顾晓颖 张云娟 李凌飞 《Agricultural Science & Technology》 CAS 2017年第11期2026-2032,共7页
Arachidonic acid (ARA or AA), one of the most important polyunsaturated fatty acids (PUFAs), has various physiological activities and positive effects on human health. ARA production by Mortierella alpina has beco... Arachidonic acid (ARA or AA), one of the most important polyunsaturated fatty acids (PUFAs), has various physiological activities and positive effects on human health. ARA production by Mortierella alpina has become a hot topic in recent years, owing to that it is effective, safe and easy to control. How to improve ARA yield and purification efficiency is important to ARA production in M. alpina. Therefore, in this review, we summarized some methods to improve ARA yield: optimization of culture conditions, mycelium aging technologies and metabolic regulation, and the commonly used methods for ARA isolation and purification, to provide a theoretical basis for ARA production by M. alpina fermentation. 展开更多
关键词 Mortierella alpina Arachidonic acid FERMENTATION Metabolic regulation Punhcation
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